Platform-scale.



PLATFORM s011111. 1111.101111@ 211.1111111 11, 1907.v v

' A Patented 0015.211908.

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41, 4/ Y /I @i K ,.Alv 2 nonkoz David Lennox DAVID LENNOX, OFMARSHALLTOWN, IOWA.

PLATFORM-SCALE.

Specification of Letters Patent.

Patented Oct. 20, 1908.

Application led May 11, 1907. Serial No. 373,034.

To all whom 'llt may concern:

Be it known that I, DAVID LENNoX, a citizen of the United States ofAmerica, and a resident of Marshalltown, Marshall county, Iowa, haveinvented certain new and useful Improvements in Platform-Scales, ofwhich the following is a specification.

My invention relates to improvements in weighing scales, and the objectof my improvement is to provide improved friction-` less corner bearingsfor the rock-shafts which constitute part of the operating mechanismthereof. This object I have accomplished by the means which arehereinafter fully described and claimed, and which are illustrated inthe accompanying drawings, in which Figure 1 is a top plan view with theplatform omitted, showing one end of a scale embodying my invention;Fig. 2 is a detail plan view of the swinging link-connection for therock-shaft; Fig. 3 is an end elevation of the same; Fig. 4 showsenlarged detail side and end elevations of the corner link; and Fig. 5is an enlarged detail of the rockshaft end ring.

Similar reference numerals refer to similar parts throughout the severalviews.

My improvements are designed for use in connection with that form ofweighing scales denominated commonly as pitless wagonscales.

The numeral 1 designates a side wall of the scale frame, while 2designates an end thereof. Angle-plates 10 are fastened to the insidefaces of each interior corner of the frame 1-2, and such plates are alsoprovided with an upper horizontally projecting plate 18, of triangularshape. A cylindrical stud 24 is secured to the inner face of one memberof the angle-plate 10, at each corner of the frame, by means of a boltpassing through the side 1. Grooved rings 13 are mounted on the innerends of the studs 24, and links 12 are hung on said grooved rings so asto freely swing therefrom, as shown in Fig. 3.

The numeral 5 denotes a rock-shaft located parallel to and near theend-frames 2, a similar shaft being located adjacent the other end-frame2 (not shown), the ends of each rock-shaft having bearing arms 27 whichrest in grooved rings 11 similar to the rings 13, and seated in thelower loops of the links 12 so as to act as freely suspended bearingsfor the rock-shafts 5 aforesaid.

I have shown two longitudinal beams 3 and 4, each of which has securedto either end the plates 7, the latter extending beyond the ends of saidbeams and forming bifurcations having each a cross-piece 8 with aknife-edge on its lower surface, the knifeedge in each case bearing uponan inwardly projecting lug 9 of the rock-shafts 5. The numeral 17denotes arms projecting inwardly from said rock-shafts, secured to lugson said rock-shafts. The operative connection of arms 17 to thescale-beam-lever may be of any ordinary or preferred sort and is notshown because it forms no part of the present invention.

The corner plates 18, while strengthening the connection at the cornersof the frame, are useful also as a cover for the link-bearingsthereunder, although the latter will always easily clear themselves fromany deposit, by reason of their swing and rolling motion.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

1. In a weighing scale of the type set forth, the combination with aframe and a rock shaft, of a stud secured to the frame, a grooved ringcarried by said stud, a link having its upper end engaged about saidring, and a second grooved ring seated in the lower end of said link androtatable with relation thereto, said shaft having a bearing' end forengagement in said second ring.

2. In a weighing scale of the type set forth, the combination with aframe and a rock shaft, of a link -suspended for oscillating movement,and a grooved ring seated in the lower end of said link and rotatablewith relation thereto, said shaft having a bearing end for engagement insaid ring.

3. In a weighing scale of the type set forth, the combination with aframe and a rock shaft, of a stud secured to the frame, a grooved ringcarried by said stud, a link having its upper end conformably engagedabout said stud, and a second grooved ring conformably engaged in thelower end of said link, said shaft having a bearing end for engagementin said second ring.

4. In a weighing scale of the type set forth, the combination with aframe and a Signed at. Marfsbaiitown, Iowa, this 27th rook shaft, of astud, a grooved ring Carried day of April 1907. thereby, and a linkhaving its nppe end conformably engaged about said ring, said linkbeing` capable of oscillating movement with /Vitnesses: relation to saidring and supporting one end W. H. HAMMOND, of said shaft. ELSIE PEER.

DAVID LENNOX.

